divinity wrote...
how can i fix that, is there a way to fix it.
divinity wrote ...
2017/10/17
class or method
public double doublearea(double side2, double side2, double side3){
double s;
double area;
s = (2 + 2 +3)/2;
area = Math.sqrt(s *(s - 1) * (s - 2) * (s - 3));
return area;
}I am getting an error saying: variable
here is the error
on line 1
variable side2 is already defined in method doublearea(double,double,double)
Do not change the name of your variables -- you only want to change the value(s). Change line 1 back to what you had. You need to change the (1, 2, 3) in the 'actionPerformed' method and then convert the literals '1', '2' and '3' in the 'doubleArea' method (old line 6) to the appropriate parameter variable names.
hi danpost
I tried testing out the calculation on a area calculator on a webpage: the number used is: 3, 4, 3, the answer i got was: 4.47213595499958 Square Units but when i tested it on my calculator, the answer i got was this: 2.5617376914898995
I tried another set of numbers and ah got is: testing numbers is 5,6,7, answer ah got is;14.696938456699069 Square Units but when I used the same number of my calculator is ah got this; 2.5617376914898995, which is the exact same answer from the first test. then something is again off
Ah... improvement -- you are now getting non-zero output. That is a plus. Show you revised 'doublearea' method for review.
here it is. tell me where else that need fixing
@Override
public void actionPerformed(ActionEvent ae) {
double A = Double.parseDouble(side1.getText());
double B = Double.parseDouble(side2.getText());
double C = Double.parseDouble(side3.getText());
double area= doublearea(2, 2, 3);
displayArea.setText( area +"");
}
public double doublearea(double side1, double side2, double side3){
double s;
double area;
s = (side1 + side2 + side3)/2;
area = Math.sqrt(s *(s - 1) * (s - 2) * (s - 3));
return area;
}
/* public static boolean isvalid(double side1, double side2, double side3) {
return (side1 + side2 > side3 && side1 + side3 > side2 && side2 + side3 > side1);
}*/
public static void main(String[] args) {
HeronFormulaCalculator hfc = new HeronFormulaCalculator();
hfc.setBounds(300, 300, 350, 250);
hfc.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
hi danpost
I change it to
and when ah test it again the answer ah got is 1.984313483298443
when the real is is supposed to be 4.4721
double s;
double area;
s = (side1 + side2 + side3)/2;
area = Math.sqrt(s *(s - side1) * (s -side2) * (s - side3));
return area;With that result, I would say that you are using (2, 2, 3) in your calculations. Make sure your 'actionPerformed' method is not overriding the values you give for the sides.
divinity wrote...
so wat do u think ah shud do and how to fix ithi danpost
I tried putting side1, side2, side3 in the doublearea actionperformed method but was getting an error saying: incompatible types: JTextField cannot be converted to double
In the class, side1, side2 and side3 are JTextField objects while the ones with the same name in the doublearea method are doubles. Maybe you want to get the value in the text field and not the text field itself. In the actionPerformed method, you get A, B and C. Try to use them as parameters.
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